<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01JS的三种引入方式</title>
</head>
<body>
    <button onclick="alert('请先登录！')">点击即玩</button>
    <button onclick="console.log(666)">点击即玩2</button>
    <h1 id="h1">我是大标题</h1>
    <script>
        console.log(h1)
    </script>
    <script src="01.js">
        console.log('你干嘛哎呦');
    </script>
</body>
</html>